Corrective Maintenance; Power Source; Handpieces - Pace 20A Operation & Maintenance Manual

Power Source

Most malfunctions are simple and easy to correct. Refer to Table II below to clear
these malfunctions.
Symptom
No power to system.
No heat on handpiece.
Table II. Power Source Corrective Maintenance

Handpieces

The following "Heater Assembly Checkout Procedures" (Table III) is applicable
to all PACE SensaTemp handpieces used with the ST 20A system except for the
ThermoTweez (TT-65) handpiece. Refer to either of the TT-65 manuals (5050-
0300 or 5050-0336) for troubleshooting procedures pertinent to that handpiece.
Perform the procedures with the handpiece (and heater) at room temperature. If the
handpiece is warm, resistance readings will be different from those shown.
Disconnect the handpiece from the power source. Use a meter to check resistance
across the handpiece connector plug pins as outlined in the "Checkout Procedure"
column.
Symptom Checkout Procedure
No heat Check resistance - Pin 2 to
Pin 5. Refer to "Heater
Specifications" column.
If resistance is high - -
Check resistance - Pin 3 to
Pin 6. If circuit reads open - -
Handpiece Check resistance - Pin 3 to
overheating Pin 6. Resistance should be
LED is Red 110 ohms. If resistance is
less than 105 ohms - -
Fuse blows Check resistance - Pin 2 to
when unit is Pin 5. Refer to "Heater
turned on. Specifications" column. If
resistance is low - -
No Ground Check resistance - Pin 4 to a
on Tip. NEW Tip. Resistance should
be less than 2 ohms. If not - -
Table III. Heater Assembly Checkout Procedures
Probable Cause Solution
Blown Fuse Check handpiece using Table III . Replace the
fuse (located in the AC Receptacle/Fuse Holder)
with one of same value (see Table V parts list).
Defective Heater See Table III below or refer to handpiece Manual.
Cause
Open Heater
Open Sensor
Shorted Sensor
Solder short in
Handpiece.
Shorted Heater
Oxidation in
Heater Bore.
Defective Heater Replace Heater

Corrective Maintenance

Solution
Replace Heater
Assembly.
Replace Heater
Assembly.
Replace Heater
Assembly.
Remove Short.
Replace Heater
Assembly & Fuse1.
Replace Heater
Assembly & Fuse.
Clean Heater Bore
using appropriate wire
brush.
Assembly.
Heater
Specifications
SP-1A = 10-12 ohms
SP-2A = 8-10 ohms
SX-70 = 8-10 ohms
TP-65 = 9 - 11 ohms
Connector
Plug Pinouts
19